232121 has 4 divisors (see below), whose sum is σ = 234612. Its totient is φ = 229632.

The previous prime is 232117. The next prime is 232129. The reversal of 232121 is 121232.

It is a happy number.

232121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42025 + 190096 = 205^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 232121 - 2² = 232117 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (232129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1100 + ... + 1293.

It is an arithmetic number, because the mean of its divisors is an integer number (58653).

2²³²¹²¹ is an apocalyptic number.

It is an amenable number.

232121 is a deficient number, since it is larger than the sum of its proper divisors (2491).

232121 is an equidigital number, since it uses as much as digits as its factorization.

232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490.

The product of its digits is 24, while the sum is 11.

The square root of 232121 is about 481.7893730667. The cubic root of 232121 is about 61.4570171380.

Adding to 232121 its reverse (121232), we get a palindrome (353353).

Subtracting from 232121 its reverse (121232), we obtain a square (110889 = 333²).

It can be divided in two parts, 232 and 121, that added together give a palindrome (353).

The spelling of 232121 in words is "two hundred thirty-two thousand, one hundred twenty-one".